You probably have an intuitive idea of what a circle is: the shape of a basketball hoop, a wheel or a quarter. You may even remember from high school that the radius is any straight line that starts ...

Mastering degree-radian conversions is crucial for trigonometry and calculus. Radians simplify mathematical formulas, ...

Part of that is the way it's taught. Students are taught the "unit circle" and its relationship to trigonometry, but many fail to make the leap on how crucial circles are for trig functions.

Trigonometric identities are powerful tools for simplifying complex equations in math and science. Three core ...

You probably have an intuitive idea of what a circle is: the shape of a basketball hoop, a wheel or a quarter. You may even remember from high school that the radius is any straight line that starts ...

A unit circle is an important part of trigonometry and can define right angle relationships known as sine, cosine and tangent.

A unit circle is an important part of trigonometry and can define right angle relationships known as sine, cosine and tangent.